Table 2.

Classification of cases according to documented aetiology of hyponatraemia

Aetiology	Overall
	(N=42), n (%)
Hypovolaemic	23 (54.7)
Gastrointestinal Na losses	9 (21.4)
Poor oral intake	7 (16.6)
Diuretics	6 (14.3)
Adrenal insufficiency	1 (2.4)
Euvolaemic	11 (26.2)
SIADH due to pneumonia	4 (9.5)
Drug-induced SIADH	3 (7.1)
Malignant SIADH	2 (4.8)
Miscellaneous causes	2 (4.8)
Hypervolaemic	8 (19.1)
Decompensated cirrhosis	4 (9.5)
Heart failure	4 (9.5)

SIADH, Syndrome of inappropriate antidiuretic hormone secretion.